Tongs.



C. R. LAW.

TONGS.

APPLICATION men AUG-6., m5.

Patented J 1111B 13, 1916.

Inventor 4 Witnesses I NJ 4 76K79vm tw w e n r. O t A CHARLES R. LAW, OFMANSFIELQILOUISIANA.

To all whom it may concern:

Be it known that I, CHARLES R. LAW, a

citizen of the United States, residing at Mansfield, in the parish of DeSoto and btate of Louisiana, have invented a new and useful. Tongs, ofwhich the following. is a specification. i

This invention relates to tongs such as chain tongs, etc., one of theobjects being to provide tongs having all of the advantages of casingand tool joint tongs,such as used primarily in the construction of oilwells and for like purposes.

A further object is toprovide an attachment for ordinary pipe tongswhereby the same tool can be used as casing tongs.

With the foregoing and other objects in view. which will appear; as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, can be made within thescope of what is claimed,without departing from the spirit'of theinvention. In the accompanying drawings, the preferred forms of theinvention have been shown. g

In said drawings :Figure.1 is aside elevation of pipe tongs of ordinaryconstruction having combined therewith an attachment whereby the samecan be used as casing tongs. Fig. 2 is a longitudinal section throughthe attachment and showing the grip block. in elevation. Fig. 3 is anend view of the attachment, the grip block be ing removed. Fig. 4: is asection on line A.-B Fig. 2. Fig. 5 is a perspective view of the gripblock, a part being shown in section. Fig. 6 is a side elevation of amodified form of tongs.

Referring to the'figures by characters of reference l'designates thehead of pipe tongs of any standard form, the same having op-' usualmanner. In order to adapt these tongs for use in casing tongs, anattachment such as shown in Figs. 2 to 5 inclusive may be employed. Thisattachment includes a member in the form of a sleeve 5 adapted to fitsnugly over the jaws of the head 1, the ing TONGS.

terior of the sleeve being tapered toward one Patented June 13, 1916..Application filed August 6, 1915.. Serial No. 44,058. i

end so that the jaws willfitgproperly therein and the small end of thesleeve being open to permit the chain 4 to extend therethrough. Thissleeve is open at both ends and at one side and isprovided within thelarge end portion thereof, with parallel webs 6 extending -fromthe openside to the closed side of thesleeve and forming spaces 7 for thereception of the jaws of the tongs and an intermediate space 8 for thereception of the chain. Inwardly extended flanges 9 are formed along theopen side of the sleeve for engaging the jaws and holding the sleeveagainst lateral displacement relative thereto.

Formed in opposed. faces of the sleeve are threaded openings 10 for thereception of set screws 11, these set screws being adapted to bind uponopposite sides of the head 1, thus to fasten the sleeve securely tothe'head.

Formed in the closed side of the sleeve close to the small end thereofis a transverse upon the back of a grip block 16. This grip block iscurved from one end to the other and is provided, on its concave facewith transverse teeth or serrations 17, adapted to' engage a casingbeing turned by means of the tongs.

Obviously by loosening the screws 11, the sleeve 5 can be detachedreadily from the tongs and said tongs used as ordinary pipe tongs. I

Instead of providing pipe tongs with an attachment such as described, itis to be understood that, if preferred, and as shown in 'Fig. 6, thetongs can be provided with the usual toothed jaw 18 at one side of themem ber or head 19, while at the other side of said member or head maybe provided outstanding ears 20 to which a block 21 corresponding withblock 16 may be pivotally connected in the manner hereinbefore pointedout. Thus without providing an attachment, the one tool can be used asordinary pipe tongs and as casing tongs.

Obviously various changes in the arrangement and proportions of theparts can be made to adapt the attachment herein dedifferent shapes andsizes, Withoutdepartscribed for use in connection with tongs of ing fromthe spirit of the invention.

1 Importance is attached to the fact that the bearing rib 14 engages theWall of the chanmil or groove 12 so that said Wall thus re- -ceives allof the strain exerted through the block 16 andthe screw of pin merelyoperates to hold the parts together.

It Will be noted that the pivot member 15 is removable so that itis'thus possible to remove the grip blocks readily. Consequently,

grip blocks of different sizescan be used in connection with theattachment.

that When the device is'used', the block Will grip an object at onepoint While the chain will grip the object at opposed points and in thesame plane;

What is claimed is 1. In chain tongs, a member, a chain ex-.

tending at one end into said member, a toothed grip block pivotallyconnected to the member and supported therebeyond, said chain and gripblock being extended in the same plane.

Coflel of thll patent may be obtained for 2. In chain tongs, a head, amember detachably secured to the head, and a toothed.

grip block pivotally connected to said member.

3. In chain tongs,'a head, a member detachably secured to the head, saidmember having arecess, a grip" block, a bearing proj ection on the blockand fitted snugly Within the recess, and a pivotal'connection betweensaid projection and the member.

4. In chain tongs, ahead, a sleeve embracing the head and having anopening for the extension of a chain therethrough, and a toothed gripblock pivotally connected to the sleeve.

5. In chain tongs, a head, a chain, a sleeve embracing the head endhaving an opening for the extension of the tongs chain therethrough,means for detachably securing said sleeve to the head, the said sleevehaving a recess in one side thereof, a grip block, a bearing projectionon the block fitting snugly Within the recess, and a pivotal connectionbetween said projection and the sleeve. 7

6. In chain tongs, a head, a sleeve having separate jaW receiving spacesand mounted on the head, said sleeve having open ends, means Within thesleeve for detachably securing the sleeve to the head, and a curvedandtoothed grip block pivotally connected tothe sleeve.

In testimony that I claim the foregoing as myoWn, I have hereto afiixedmy signature in the presence of two Witnesses.

OHARLE S R. LAW.

five cents each, by addressing the "Commissioner of Intel,

Washington, D. G.

